Wing nut



FIG. 1 is a perspective view, of a wing nut showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof (the other side view being the same);

FIG. 4 is an end view thereof (the other end view being the same).

FIG. 5 is a bottom view thereof. 

The ornamental design for a wing nut, as shown. 